Improvement in relief-plates for printing



UNITED STATES PATENT OFFICE.

BENJAMIN B. HUNTOON, OF LOUISVILLE, KENTUCKY.

IMPROVEMENT lN RELIEF-PLATES FOR PRINTING, &c.

Specification forming part of Letters Patent No. 163,204, dated May 11,1875; application filled February 10, 1875.

The invention consists in obtaining relief impressions from ordinarytype on thin sheets of metal by means of an ordinary printing press, andafterward filling in a backing to said metal sheets, as hereinafterspecified.

The matter which it is desired to obtain in relief is put on anyordinary printing-press, in the usual manner, and a piece of thin sheetmetal, as brass, run through the press, in pre: cisely the same manneras an ordinary sheet of paper would be were it to be printed. A

good clear imprint will be obtained, and the metal may then be trimmedto a proper size,

and is backed up or filled with ordinary hy:

dranlic cement, which may have added to it sufficient lime to destroyits quick-setting properties, as it is necessary that it should remainplastic long enough to allow of its being rubbed smooth. This backing isthen covered with cambric, or other suitable cloth, glued or 0th erwisefixed thereon, so that it may present an even finished appearance.

What I claim is-- 1. The herein-described method of produc-- ingrelief-plates, consisting in striking up a: sheet-metal face, fillingthe back of the same, with cement, and then attaching a fabric to; theback thereof, substantially as specified.

2. As an article of manufacture, a printing or, relief plate composed ofa sheet-metal face, cement filling, and cloth backing, constructed andarranged substantially as shown.

BENJAMIN B. HUNTOON.

Witnesses:

CHARLES SWETNER, GEORGE W. GRIFFITHS.

